Spark-flug.



c. E. TALBBRT.

SPARK PLUG.".

APPLICATION FILED MAR. 178, 1912 Patented Feb. 17, 19M

if ED $TATE1 CHARLES E. TAL'BER'E,

STE}

App? Zion film More}: 1%. axial In ists-l9.

r1 gig v i 2ilhfl l3fffllL?!71?:(lf/COIZV. N llahlel i v i is a. longiuidnml sec be itknown that l, (min la. linnrrrr, urinal. View of ii modilind Form f rho in- 21 ci izen o the llnitcd Forth. rrsidinr: at ll'ashingion, in the. District of Cohinlliia. ha e invented certain now and useful lin prorenmnts in Spark-l lugzs. of which the following is a specification.

This invention relates to spark plugs.

ln tho use of spark pl for nuioiiiohilcs and other gas engines thcrc is more or less diilicnlty cxpericnccd in providing for on cllici-ent sparking'to insurcexplosions in llie engine cylinders. This dillicnlty 1., musod more or i0. by carlwn twining: on tho sparking tcrminals. pro ranting n jump of a spark from our tcrniinzil in tho other.

Itis therefore. tho prin'nzry object oi in; invcntion to proridc a spark plug inn" cooperating sparking torininzils so formed and associated with relation to earn other? as to provide for a plurality of sparking surfaces wherein. whether from oil or tho formation of carbon on. the terminals. thr surfaces of the tcrininals arr; mm likm to he exposed so as to provide, for spurlrin I to explod the gases in the engine cylinder.

Another object of the invention is to provide a sparking plug having inner and outer terminals. the; outer terminal lacing prciicn uhl s spirally wound around tho inner tow-niin spaced relation to the lattcr \vil'n "Ll" nul coils of the spirally Wound tcrininnl prcl' crably uniformly spaced from the inncr coil so as to provide a plurality of sparking surfaces.

A still further object is to provide a spark plug embodying two terminals one of which is spirally Wound-around the other in spaced relation thereto with the outer ends of the terminals so arranged that drippings from onc terminal will not fall upon the other.

With the above and other objects in View the present invention consists in the comhi nation and arrangement of parts heroina't'tcr more fully (loscrihcd. illustrated in thc accompanying drawings and particularly pointed out in the appended claim, it being understood that (hang '0) nnzv he inailc the form. proportioi'i. sintilltl oihcr iioi dctnils Without dcimrting from tho spirit 0. sa rificing any of the advantages of the in \c lion.

in tho drawings 1-l igure l is an elevation of one, form of spark plug embodying my invention. Fig. 2 is a longitudinal sec- I jump of a,

I tcriorly scrrnv 'lhrczu'lcd as renrion. lilo". 4 is on 0nd virsw of the inodi tlcd form (it ping. Fig. 5 is an PlP'Yfit'lOU of the lam y of the win: illustrating a side i n r' tho in Animals of tho modilid form.

lioliierring now more particularly to the acconipz-iny wing it will be under stood that 0} nircmion is nppliciihl to inv hypo nif spark plug out for purposes of illusilrz l'ion, 1 hair: shown a common form of spark plug which in th' 111cc. con ists of 22 hmly portion 10 ha an 0nd and 9X- ll, for Wo icing snarl; opening: of all i cylindcr, ho latter not. shown. The hotly 10 has on intornnl slzouldcr l for the support of ilh'i porcelain r'otizer insulating ro x11 l3. This ll iilllllllf inomlicr l hri. tightly on i'hr ii i g s incur-i of ill@ not M which in: \voriiingg ill. with the internal screw threaded D rtion at tho outer 0nd of the body 10. as clcnrly shown in the lit in the'usunl in any Fiiilnl 1?; prox'idwl with lsczid l (hired i'ic-"h p rtion 17 hrzn-cd hr the luv," '5 conductor in the usual l king: nioizzlwr is g yrhhh'l x a l. .zi horn in which is: fitted n conforming," wirc '18 \"l h has its upper 4 nd upscl m 19 and contacting with thc bras: cap Tho plurolity of spaced coils arr ow nlmvc another and .vhzch encir e 3 t 'il'lilliil 20 in spaced rclz' o tho lnttcr with tic coils 'pretornl. l nniioro'iiy sword therefrom. This terminal is prc-lerahly i'mnwl f Vai rigid still i' c and ff- 6h one tin provides a spirh'ing' surface. will. the result that there low :1, rain l rulity of sparking sin-faces so Lhuf' in the l i l er -lit of carbon forming on portions oil? the di'tl'crent coils thcre arc, still surfaces of our or more coils'cxposed to PXGVPIlQ, for rho spam troni one terminal to the l (k (i other to explode the gases in the engine cylinder..

i I The spirally wound terminal 20 referfably composed of-yery, stifi wire, an if desired, its outer extremity may bepointed as indicated at 20'. In any event, the coils of the spirally wound terminal are preferably guniformly spaced from the inner terminal 19 and has its outer endterminatingwithin the plane *of its coilsso that any drippin 'of oil which may flow downthe spiral y wound terminal will not fall upon the inner terminal vand, .whereby, drip ings of oil flow' down theinner termina will not fall upon t e spirally-wound terminal.

In Figs. 3, 4 and5, there isjshown a modi-e fied form'of the invention.v In this instance, the plug may be of any suitable type, but, as Shown, is like the lug illustrated in F ig's.

1 and 2. In this di erenttype of invention the terminals are the same except that the spirally wound terminal 23 has its, lower coil directed outwardly as at 24:, and then directed upwardly as at 25, and again outwardly, as at 26 with the part 26 secured to the plug in the same manner that the part 26 of the spirally wound terminal is secured to the plug. The parts 24 and 26 are disposed preferably at points apart a distance of substantially or exactly onequarter of the circumference of theg inner end of the plug 10 to. provide fora betterbracing efiect, 1f f'such h ld be necessary n s, than would in certain I luf I l afforded if the I or ends 24 and26of the rectly o posite each other across the-[inner end 0ft eplug. l

What is claimed is A spark plug comprisingahollow' body spirally, woun' terminalwere disposed -di.-,

whose inner end I is circulalgia terminal mountedin the hollowplug and projectin% therefrom, a second terminal composed o v a piece of conducting ,material coiled in- .termediate its ends forpooperation with the first named terminal to provide a plurality of sparking surfaces and having its ends secured to the inner end of the body at points apart adistance substantially one-quarterof the circumference of the outer end of sair. 

